{"id":64445,"date":"2023-07-28T20:48:24","date_gmt":"2023-07-28T12:48:24","guid":{"rendered":"http:\/\/stmu.1000uc.com\/mu\/?p=64445"},"modified":"2023-07-28T20:48:24","modified_gmt":"2023-07-28T12:48:24","slug":"%e5%a5%87%e8%bf%b9mu%e7%94%a8%e4%bb%80%e4%b9%88%e9%a9%b1%e5%8a%a8%e4%b8%bb%e6%9d%bf%e7%9a%84iommu%e6%98%af%e4%bb%80%e4%b9%88%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"http:\/\/stmu.1000uc.com\/mu\/64445.html","title":{"rendered":"mu\u7528\u4ec0\u4e48\u9a71\u52a8(\u4e3b\u677f\u7684iommu\u662f\u4ec0\u4e48\u529f\u80fd)"},"content":{"rendered":"

\u8fd9\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u804a\u804a\u5173\u4e8e\u5947\u8ff9mu\u7528\u4ec0\u4e48\u9a71\u52a8\uff0c\u4ee5\u53ca\u4e3b\u677f\u7684iommu\u662f\u4ec0\u4e48\u529f\u80fd\u5bf9\u5e94\u7684\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5404\u4f4d\u6709\u6240\u5e2e\u52a9\uff0c\u4e0d\u8981\u5fd8\u4e86\u6536\u85cf\u672c\u7ad9\u54e6\u3002<\/p>\n

b753mu3+ \u914d\u4ec0\u4e48\u663e\u5361<\/h3>\n

\u534e\u7855B75\u4e3b\u677f\u4e0a\u4f7f\u7528\u7684\u663e\u5361\u63d2\u69fd\u7684\u63a5\u53e3\u7c7b\u578b\u662fpCIE\u63a5\u53e3\u3002\u6240\u4ee5\u4ece\u7406\u8bba\u4e0a\u6765\u8bb2\uff0c\u53ea\u8981\u63a5\u53e3\u662fPCIE\uff0c\u90a3\u4ece\u7406\u8bba\u4e0a\u6765\u8bb2\uff0c\u90fd\u662f\u53ef\u4ee5\u4e0eB75\u4e3b\u677f\u5339\u914d\u7684\u3002<\/p>\n

\u4f46\u5728\u73b0\u5b9e\u4e2d\uff0c\u4e3a\u4e86\u5145\u5206\u53d1\u6325\u4e3b\u677f\u548c\u5904\u7406\u5668\u7b49\u90e8\u4ef6\u7684\u6027\u80fd\uff0c\u4e0d\u5efa\u8bae\u4f7f\u7528\u7b2c\u4e09\u4ee3i7\u3002\u6700\u4f73\u7684\u9009\u62e9\u5e94\u8be5\u662f\u4e8c\u4ee3\u7684i54\u6216\u8005\u5176\u7b2c\u4e09\u4ee3i5\u3002<\/p>\n

mu3-wn823n\u662f\u4ec0\u4e48\u4e1c\u897f<\/h3>\n

USB\u7f51\u5361\u63d2\u4e0a\u4e4b\u540e\u8981\u5b89\u88c5\u9a71\u52a8\u7535\u8111\u624d\u80fd\u8bc6\u522b\u3002\u3002\u3002<\/p>\n

\u5b89\u88c5\u597d\u9a71\u52a8\u4e4b\u540e\u4f60\u53f3\u952e\u7f51\u4e0a\u90bb\u5c45-\u5c5e\u6027\u5c31\u56de\u770b\u5230\u672c\u5730\u8fde\u63a5\u65c1\u8fb9\u591a\u4e86\u4e00\u4e2a\u65e0\u7ebf\u8fde\u63a5<\/p>\n

\u7535\u8111\u53f3\u4e0b\u89d2\u4e5f\u591a\u4e86\u4e00\u4e2a\u65e0\u7ebf\u8fde\u63a5<\/p>\n

\u4e3b\u677f\u7684iommu\u662f\u4ec0\u4e48\u529f\u80fd<\/h3>\n

IOMMU(i\/omemorymanagementunit)\u3002iommu\u6709\u4e24\u5927\u529f\u80fd\uff1a\u63a7\u5236\u8bbe\u5907dma\u5730\u5740\u6620\u5c04\u5230\u673a\u5668\u7269\u7406\u5730\u5740\uff08dmar\uff09\uff0c\u4e2d\u65ad\u91cd\u6620\u5c04\uff08intremap\uff09\uff08\u53ef\u9009\uff09<\/p>\n

1.1dma\u5730\u5740\u7a7a\u95f4\u6620\u5c04<\/p>\n

Iommu\u7684\u4e3b\u8981\u529f\u80fd\u4e3a\u8bbe\u5907dma\u65f6\u523b\u80fd\u591f\u8bbf\u95ee\u673a\u5668\u7684\u7269\u7406\u5185\u5b58\u533a\uff0c\u540c\u65f6\u4fdd\u8bc1\u5b89\u5168\u6027\u3002<\/p>\n

\u5728\u6ca1\u6709Iommu\u7684\u65f6\u5019\uff0c\u8bbe\u5907\u901a\u8fc7dma\u53ef\u4ee5\u8bbf\u95ee\u5230\u673a\u5668\u7684\u5168\u90e8\u7684\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n

1\u3001\u8fd9\u79cd\u673a\u5236\u4e0b\u5982\u679c\u5c06\u8bbe\u5907\u7684\u9a71\u52a8\u653e\u5728\u7528\u6237\u6001\uff0c\u90a3\u4e48\u5982\u4f55\u4fdd\u62a4\u673a\u5668\u7269\u7406\u5185\u5b58\u533a\u5bf9\u4e8e\u7528\u6237\u6001\u9a71\u52a8\u6846\u67b6\u8bbe\u8ba1\u5e26\u6765\u6311\u6218\u3002\u5f53\u51fa\u73b0\u4e86iommu\u4ee5\u540e\uff0ciommu\u901a\u8fc7\u63a7\u5236\u6bcf\u4e2a\u8bbe\u5907dma\u5730\u5740\u5230\u5b9e\u9645\u7269\u7406\u5730\u5740\u7684\u6620\u5c04\u8f6c\u6362\uff0c\u4f7f\u5f97\u5728\u4e00\u5b9a\u7684\u5185\u6838\u9a71\u52a8\u6846\u67b6\u4e0b\uff0c\u7528\u6237\u6001\u9a71\u52a8\u80fd\u80fd\u591f\u5b8c\u5168\u64cd\u4f5c\u67d0\u4e2a\u8bbe\u5907dma\u548c\u4e2d\u65ad\u6210\u4e3a\u53ef\u80fd\u3002<\/p>\n

2\u3001\u5982\u679c\u5c06\u8fd9\u4e2a\u7269\u7406\u8bbe\u5907\u901a\u8fc7\u900f\u4f20\u7684\u65b9\u5f0f\u8fdb\u5165\u5230\u865a\u62df\u5316\u865a\u62df\u673a\u91cc\uff0c\u865a\u62df\u673a\u7684\u8bbe\u5907\u9a71\u52a8\u914d\u7f6e\u8bbe\u5907\u7684dma\u540e\uff0chypervisor\u5fc5\u987b\u5728\u900f\u4f20\u8bbe\u5907dma\u8bbf\u95ee\u65f6\u523b\uff0c\u5bf9dma\u8bbf\u95ee\u8fdb\u884c\u622a\u83b7\uff0c\u5c06\u5176\u4e2ddma\u8bbf\u95ee\u7684\u865a\u62df\u673a\u7269\u7406\u5730\u5740\uff0c\u8f6c\u6362\u4e3ahypervisor\u4e3a\u865a\u62df\u673a\u5206\u914d\u7684\u7269\u7406\u5730\u5740\uff0c\u4e5f\u5c31\u662f\u9700\u8981\u5c06\u865a\u62df\u673a\u900f\u4f20\u8bbe\u5907dma\u8bbf\u95ee\u505avpaddr(\u865a\u62df\u673a\u7269\u7406\u5730\u5740)—->ppaddr\uff08\u7269\u7406\u673a\u7269\u7406\u5730\u5740\uff09\u3002\u8fd9\u90e8\u5206\u622a\u83b7\u5bf9\u865a\u62df\u673adma\u6765\u8bf4\u5e26\u6765\u5207\u6362\u5230hypervisor\u5f00\u9500\uff0chypervisor\u8f6c\u6362\u5730\u5740\u5f00\u9500\u3002<\/p>\n

\u5f53\u5f15\u5165\u4e86iommu\u4ee5\u540e\uff0c\u8fd9\u90e8\u5206\u5f00\u9500\u7531iommu\u786c\u4ef6\u627f\u62c5\uff0c\u6240\u6709hypervisor\u5de5\u4f5c\u5c31\u66f4\u52a0\u7b80\u5355\uff0c\u53ea\u9700\u8981\u5c06\u900f\u4f20\u8bbe\u5907Iommudma\u5730\u5740\u6620\u5c04\u8868\u4f7f\u7528vpaddr—>ppaddr\u5730\u5740\u8f6c\u6362\u8868\u5373\u53ef\uff08\u8fd9\u90e8\u5206\u8868\u5728hypervisor\u91cc\u914d\u7f6e\u5728ept\u4e2d\uff09<\/p>\n

3\u3001\u65b9\u4fbf\u4e86\u8001\u5f0f32\u4f4dpci\u786c\u4ef6\u572864\u4f4d\u673a\u5668\u4e0a\u7684\u4f7f\u7528\u3002\u53ea\u9700\u8981\u5728iommu\u5730\u5740\u6620\u5c04\u8868\u4e0a\u914d\u7f6e32bitpci\u8bbe\u5907dma\u5730\u5740–>64\u4f4d\u673a\u5668\u7269\u7406\u5730\u5740\u5373\u53ef\u3002<\/p>\n

4\u3001\u65b9\u4fbf\u4e86\u4e3b\u673aos\u914d\u7f6e\u8bbe\u5907dma\u5de5\u4f5c\uff0c\u56e0\u4e3adma\u8981\u6c42\u4f7f\u7528\u8fde\u7eed\u7684\u5730\u5740\u7a7a\u95f4\u8fdb\u884c\u8bfb\u5199\uff0c\u6709\u4e86iommu\u7684\u5b58\u5728os\u5c31\u53ef\u4ee5\u4e3a\u8bbe\u5907\u914d\u7f6e\u8fde\u7eed\u7684dma\u5730\u5740\u800c\u771f\u6b63\u5bf9\u5e94\u7684\u975e\u8fde\u7eed\u7684\u7269\u7406\u5730\u5740<\/p>\n

\u5947\u8ff9MU\u5c4f\u5e55\u53d8\u6a21\u7cca<\/h3>\n

\u5e94\u8be5\u662f\u663e\u5361\u9a71\u52a8\u6ca1\u88c5\u597d\u3001\u5bfc\u81f4\u6e38\u620f\u753b\u9762\u6a21\u7cca\u3002\u3002\u8bd5\u4e00\u8bd5\u88c5\u4e2a\u9a71\u52a8\u5427\u4e5f\u6709\u53ef\u80fd\u662f\u5206\u9891\u7387\u6ca1\u8c03\u597d<\/p>\n

\u4e94\u5341\u94c3mu-x\u667a\u80fd\u94a5\u5319\u5339\u914d\u65b9\u6cd5<\/h3>\n

\u7b54\uff0c\u4e94\u5341\u94c3mu-x\u667a\u80fd\u94a5\u5319\u5339\u914d\u65b9\u6cd5\u5982\u4e0b<\/p>\n

1\u3001\u6c7d\u8f66\u9065\u63a7\u5339\u914d\u65b9\u6cd5\u662f\u4e0a\u8f66\u5173\u597d\u6240\u6709\u8f66\u95e8\uff0c\u6253\u5f00\u9a7e\u9a76\u4f4d\u8f66\u95e8\uff0c\u63d2\u5165\u94a5\u5319\uff0c\u8fde\u7eed\u6253\u5f00\u5173\u95ed\u4e94\u6b21\uff0c\u7b2c\u4e94\u6b21\u53cc\u95ea\u4f1a\u95ea\u4e00\u6b21\u3002\u540c\u65f6\u6309\u4f4f\u9700\u8981\u914d\u5bf9\u9065\u63a7\u5668\u9501\u952e\u548c\u5f00\u9501\u952e\uff0c\u53cd\u590d\u6309\u51e0\u6b21\uff0c\u53cc\u95ea\u95ea\u4e24\u6b21\u5c31\u8bc1\u660e\u9065\u63a7\u5668\u5339\u914d\u6210\u529f\u3002\u62d4\u51fa\u94a5\u5319\uff0c\u6d4b\u8bd5\u4e00\u4e0b\uff0c\u9501\u952e\u548c\u5f00\u9501\u952e\u5373\u53ef\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n

2\u3001\u6c7d\u8f66\u662f\u7531\u52a8\u529b\u9a71\u52a8\uff0c\u5177\u67094\u4e2a\u62164\u4e2a\u4ee5\u4e0a\u8f66\u8f6e\u7684\u975e\u8f68\u9053\u627f\u8f7d\u7684\u8f66\u8f86\uff0c\u4e3b\u8981\u7528\u4e8e\uff1a\u8f7d\u8fd0\u4eba\u5458\u548c\uff08\u6216\uff09\u8d27\u7269\uff1b\u7275\u5f15\u8f7d\u8fd0\u4eba\u5458\u548c\uff08\u6216\uff09\u8d27\u7269\u7684\u8f66\u8f86\uff1b\u6216\u8005\u7279\u6b8a\u7528\u9014\u3002\u53e6\u5916\u5546\u7528\u6c7d\u8f66\u5728\u8bbe\u8ba1\u548c\u6280\u672f\u7279\u6027\u4e0a\u7528\u4e8e\u8fd0\u9001\u4eba\u5458\u548c\u8d27\u7269\uff0c\u5e76\u4e14\u53ef\u4ee5\u7275\u5f15\u6302\u8f66\uff0c\u4f46\u4e58\u7528\u8f66\u4e0d\u5305\u62ec\u5728\u5185\u3002\u4e3b\u8981\u6709\uff1a\u5ba2\u8f66\u3001\u534a\u6302\u7275\u5f15\u8f66\u3001\u8d27\u8f66\u3002<\/p>\n

\u5173\u4e8e\u5947\u8ff9mu\u7528\u4ec0\u4e48\u9a71\u52a8\u7684\u5185\u5bb9\u5230\u6b64\u7ed3\u675f\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u8fd9\u7bc7\u6587\u7ae0\u7ed9\u5927\u5bb6\u804a\u804a\u5173\u4e8e\u5947\u8ff9mu\u7528\u4ec0\u4e48\u9a71\u52a8\uff0c\u4ee5\u53ca\u4e3b\u677f\u7684iommu\u662f\u4ec0\u4e48\u529f\u80fd\u5bf9\u5e94\u7684\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5404\u4f4d\u6709\u6240\u5e2e\u52a9\uff0c\u4e0d\u8981\u5fd8\u4e86\u6536\u85cf\u672c\u7ad9\u54e6\u3002 b753mu3+ \u914d\u4ec0\u4e48\u663e\u5361 \u534e\u7855B75\u4e3b\u677f\u4e0a\u4f7f\u7528\u7684\u663e\u5361\u63d2\u69fd\u7684\u63a5\u53e3\u7c7b\u578b\u662fpCIE\u63a5\u53e3\u3002\u6240\u4ee5\u4ece\u7406\u8bba\u4e0a\u6765\u8bb2\uff0c\u53ea\u8981\u63a5\u53e3…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topic":[],"_links":{"self":[{"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/posts\/64445"}],"collection":[{"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/comments?post=64445"}],"version-history":[{"count":1,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/posts\/64445\/revisions"}],"predecessor-version":[{"id":64446,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/posts\/64445\/revisions\/64446"}],"wp:attachment":[{"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/media?parent=64445"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/categories?post=64445"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/tags?post=64445"},{"taxonomy":"topic","embeddable":true,"href":"http:\/\/stmu.1000uc.com\/mu\/wp-json\/wp\/v2\/topic?post=64445"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}